邮件编辑: Tab 缩进层级

src/components/LexicalEditor/Index.jsx

@@ -7,6 +7,7 @@ import { ContentEditable } from "@lexical/react/LexicalContentEditable";
 import { HistoryPlugin } from "@lexical/react/LexicalHistoryPlugin";
 import { AutoFocusPlugin } from "@lexical/react/LexicalAutoFocusPlugin";
 import {LexicalErrorBoundary} from "@lexical/react/LexicalErrorBoundary";
+import {TabIndentationPlugin} from '@lexical/react/LexicalTabIndentationPlugin';
 import TreeViewPlugin from "./plugins/TreeViewPlugin";
 import ToolbarPlugin from "./plugins/ToolbarPlugin";
 import { HeadingNode, QuoteNode } from "@lexical/rich-text";
@@ -24,6 +25,7 @@ import { TRANSFORMERS } from "@lexical/markdown";
 import ListMaxIndentLevelPlugin from "./plugins/ListMaxIndentLevelPlugin";
 import CodeHighlightPlugin from "./plugins/CodeHighlightPlugin";
 import AutoLinkPlugin from "./plugins/AutoLinkPlugin";
+import TabFocusPlugin from './plugins/TabFocusPlugin';
 import { useLexicalComposerContext } from '@lexical/react/LexicalComposerContext';
 
 import { $getRoot, $getSelection, } from 'lexical';
@@ -128,10 +130,12 @@ export default function Editor({ isRichText, onChange, initialValue, ...props })
           <AutoFocusPlugin />
           <CodeHighlightPlugin />
           <ListPlugin />
+          <ListMaxIndentLevelPlugin maxDepth={7} />
           <LinkPlugin />
           <AutoLinkPlugin />
-          <ListMaxIndentLevelPlugin maxDepth={7} />
           <MarkdownShortcutPlugin transformers={TRANSFORMERS} />
+          <TabFocusPlugin />
+          <TabIndentationPlugin />
           <HorizontalRulePlugin />
           <MyOnChangePlugin onChange={onChange}/>
         </div>

src/components/LexicalEditor/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) Meta Platforms, Inc. and affiliates.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

src/components/LexicalEditor/plugins/TabFocusPlugin.jsx

@@ -0,0 +1,57 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+import { useLexicalComposerContext } from '@lexical/react/LexicalComposerContext';
+import { $getSelection, $isRangeSelection, $setSelection, FOCUS_COMMAND } from 'lexical';
+import { useEffect } from 'react';
+
+const COMMAND_PRIORITY_LOW = 1;
+const TAB_TO_FOCUS_INTERVAL = 100;
+
+let lastTabKeyDownTimestamp = 0;
+let hasRegisteredKeyDownListener = false;
+
+function registerKeyTimeStampTracker() {
+  window.addEventListener(
+    'keydown',
+    (event) => {
+      // Tab
+      if (event.key === 'Tab') {
+        lastTabKeyDownTimestamp = event.timeStamp;
+      }
+    },
+    true
+  );
+}
+
+export default function TabFocusPlugin() {
+  const [editor] = useLexicalComposerContext();
+
+  useEffect(() => {
+    if (!hasRegisteredKeyDownListener) {
+      registerKeyTimeStampTracker();
+      hasRegisteredKeyDownListener = true;
+    }
+
+    return editor.registerCommand(
+      FOCUS_COMMAND,
+      (event) => {
+        const selection = $getSelection();
+        if ($isRangeSelection(selection)) {
+          if (lastTabKeyDownTimestamp + TAB_TO_FOCUS_INTERVAL > event.timeStamp) {
+            $setSelection(selection.clone());
+          }
+        }
+        return false;
+      },
+      COMMAND_PRIORITY_LOW
+    );
+  }, [editor]);
+
+  return null;
+}